Fire extinguisher



April 20 1926.

C. L. PAULUS ET AL FIRE EXTINGUISHER Filed March 31 1924 IN VE N TOR C/zarl65L.Paulu/6 Robe/"l Kauai A TTORNEY Patented Apr. 20, 1926.

UNITED STATES CHARLES L. PAULUS AND ROBERT KAUCH, 0F DAYTON, OHIO.

FIRE EXTINGUISHER.

Application filed March 31, 1924. Serial No. 703,220.

to provide a compact extinguisher which is easy to operate and may be refilled readily after use. v

A further object is to provide a novel form of refill cartridge for fire extinguishers and the like.

The invention is illustrated in the accompanying drawing wherein Fig. 1, is a part longitudinal section through a fire extinguisher incorporating the improvements of our invention.

Fig. 2 is a cross section taken through the barrel of the extinguisher and Fig. 3 is an end view taken from the handle end.

Referring to the drawing, the fire extinguisher comprises a barrel 10 which is of sheet metal construction with reinforcing ribs 11, extending annularly at spaced intervals the length of the barrel. The one end of the barrel is closed by a cap 12, through which a plunger rod 13 extends into a barrel 10 along one side wall thereof. The rod 13 is rotatable at its inner end in a bearing 14 in the wall of the barrel 10 and at its outer end where it projects from the cap 12 it-is received in another bearing 15 in the cap, the two bearings serving to hold the rod against endwise movement in the operation of the extinguisher. A hand wheel 16 is pinned or otherwise fastened on the rod 13 outside the barrel 10 for manually rotating the same. The plunger rod 13 has steep threads thereon to communi cate movement to a plunger-or follower 17,

reciprocable len hwise inside the barrel 10.

The follower 1 has a bearing 18 at one side of the barrel 10 in threads. To assume the thrust of the follower 17 in the turning of the screw threaded plunger 13 a rib or ribs 20 are provided on the back of the follower extending from the bearing 18.

which the rod 13 held against movement endwisein said bar- The follower 17 operates to compress a collapsible container or cartridge 21 in the barrel 10. T he cartridge 21 has ribbed walls of thin soft metal, such as white metal, which permits it to collapse readily under endwise pressure. The mner end of the cartridge 21 is sealed by a depressed cover 22 which serves as a socket for a compression spring 23, acting between the cartridge 21 and the follower 17. The spring serves to store up pressure therein in'the turning up .of the threaded plunger rod 13 to secure steady and even discharge of the fluid in the'continuous turning of the handle 16. The spring also serves asa resilient bufi'erv between the cartridge and the follower 17 permitting free expansion and contraction of the cartridge and its fluid contents. The bottom 24 of the cartridge is normally concave or bulged inwardly as shown and is arranged to be bulged outward-1y by the pressure of the fluid contents when the extinguisher is operated. The bottom on reversing the bulge springs into contact with a. pointed burr 25 on the inside of a cap 26 threaded as shown at 27 onto the barrel 10. The burr 25 punctures the bottom 24 of the cartridge and is apertured, as shown at 28, to serve as a discharge nozzle through which the extinguishing fluid is expelled. The bottom 24 of the cartridge 21 is soldered or otherwise joinedwith the side walls of the cartridge to form a flange 29 which overlies the end of thebarrel 10 and is secured between the end of 26 when the latter The cartridge is thus held rigidly in the barrel and is not free to coast about inside the barrel and the cap the barrel-10, through which it -m11'ight be ectiveinjured and thereby destroy the e ness of the extinguisher.

It is apparent that if the contents of a cartridge are expelled the barrel may be refilled with threading the cap 26 and removing the old cartridge.

We claim:

1. In a device of the class described in combination, a barrel, a single threaded rod rel and disposed eccentric with relation to said barrel, an operating handle on one end of said rod outside said barrel, and a plunger reciprocable in said barrel havin an elongated boss with said rod threaded a new cartridge by simply unis threaded in place.

therethrough, said plunger having a rein- Igorced rib supporting the outer end of said oss.

2. In a dispensing device such as a fire extinguisher or the like, the combination of a barrel, a closure plate removably secured on the end of said barrel having an apertured burr projecting from the inside thereof serving as a discharge nozzle, and a collapsible cartridge having a flange engaging between said closure and the end of said barrel, the bottom of said cartridge being puncturable by said burr when bulged into contact therewith.

3. In a portable dispensing device, the combination of a barrel, a plunger reciprocable therein, a closure plate removably secured on the end of said barrel having an apertured burr projecting from the inside thereof serving as a discharge nozzle, acollapsible cartridge in front of said plunger having a flange en aging between said 010- sure and the end 0 said barrelf'the bottom of said cartridge being puncturable by said burr when bulged into contact therewith, spring means between said cartridge and said plunger and means for moving said plunger along said barrel.

In testimony whereof weafiix our signatures.

* CHARLES L. PAULUS.

ROBERT KAUCH. 

